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硬式野球ボールの空力特性に対する縫目の影響
https://jaxa.repo.nii.ac.jp/records/5482
https://jaxa.repo.nii.ac.jp/records/54820bbc167e-3653-45cf-ab2c-1321becf3798
名前 / ファイル | ライセンス | アクション |
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64237024.pdf (1.3 MB)
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Item type | 会議発表論文 / Conference Paper(1) | |||||
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公開日 | 2015-03-26 | |||||
タイトル | ||||||
タイトル | 硬式野球ボールの空力特性に対する縫目の影響 | |||||
言語 | ||||||
言語 | jpn | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | hard-baseball, drag coefficient, lift coefficient, gyro-ball, backspin straight ball, drag crisis, negative magnus effect | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_5794 | |||||
資源タイプ | conference paper | |||||
その他のタイトル(英) | ||||||
その他のタイトル | Effect of seams on the aerodynamical properties of a hard baseball | |||||
著者 |
横山, 佳之
× 横山, 佳之× 高見, 圭太× 田中, 潤一郎× 宮嵜, 武× 姫野, 龍太郎× Yokoyama, Yoshiyuki× Takami, Keita× Tanaka, Junichiro× Miyazaki, Takeshi× Himeno, Ryutaro |
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著者所属 | ||||||
電気通信大学電子通信学研究科知能機械工学科 | ||||||
著者所属 | ||||||
電気通信大学電子通信学研究科知能機械工学科 | ||||||
著者所属 | ||||||
電気通信大学電子通信学研究科知能機械工学科 | ||||||
著者所属 | ||||||
電気通信大学電子通信学研究科知能機械工学科 | ||||||
著者所属 | ||||||
理化学研究所情報基盤センター | ||||||
著者所属(英) | ||||||
en | ||||||
Department of Mechanical Engineering and Intelligent Systems, University of Electro-Communications | ||||||
著者所属(英) | ||||||
en | ||||||
Department of Mechanical Engineering and Intelligent Systems, University of Electro-Communications | ||||||
著者所属(英) | ||||||
en | ||||||
Department of Mechanical Engineering and Intelligent Systems, University of Electro-Communications | ||||||
著者所属(英) | ||||||
en | ||||||
Department of Mechanical Engineering and Intelligent Systems, University of Electro-Communications | ||||||
著者所属(英) | ||||||
en | ||||||
Advanced Computing and Communication Center, Institute of Physical and Chemical Research (RIKEN) | ||||||
出版者 | ||||||
出版者 | 宇宙航空研究開発機構 | |||||
出版者(英) | ||||||
出版者 | Japan Aerospace Exploration Agency (JAXA) | |||||
書誌情報 |
宇宙航空研究開発機構特別資料: 境界層遷移の解明と制御研究会講演論文集(第41回・第42回) en : JAXA Special Publication: Proceedings of the 41st and 42nd JAXA Workshops on Investigation and Control of Boundar-Layer Transition 巻 JAXA-SP-08-006, 発行日 2009-02-27 |
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会議概要(会議名, 開催地, 会期, 主催者等) | ||||||
内容記述タイプ | Other | |||||
内容記述 | 第42回「境界層遷移の解明と制御」研究会(2008年3月31日-4月1日) | |||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Using a high-speed video camera, we measured the trajectory and rotation of a hard baseball thrown by a pitching machine. We determined the drag and lift coefficients of gyro-balls and backspin straight balls, by analyzing the video images. Two kinds of seam pattern, i.e., 2- and 4-seams, relative to the translational direction are investigated for 0.6 x 10(exp 5) < Re < 2.5 x 10(exp 5). The spin parameter (SP) is set to be 0.12, 0.23 and 0.35. The drag coefficient of a 4-seam gyro-ball decreases gradually with Re. In contrast, the drag coefficient of a 2-seam gyro-ball with SP = 0.12 and that with SP = 0.23, decrease in two steps, and their minima (about 0.2) are attained at Re = 2.2 x 10(exp 5) and 1.8 x 10(exp 5), respectively. The drag coefficient of a backspin straight ball with SP = 0.12 and that with SP = 0.23 attain their minima (about 0.3) at Re = 1.5 x 10(exp 5) and 1.35 x 10(exp 5), respectively. The lift coefficient of a backspin straight ball increases monotonically with Re, approaching a constant value 0.2 for Sp = 0.12, 0.25 for SP = 0.23, and 0.3 for SP = 0.35, respectively. No significant difference in the Re-dependence of the drag and lift coefficients is observed between 2- and 4-seams backspin straight balls. | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1349-113X | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA11984031 | |||||
資料番号 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 資料番号: AA0064237024 | |||||
レポート番号 | ||||||
内容記述タイプ | Other | |||||
内容記述 | レポート番号: JAXA-SP-08-006 |